SONG Dan
,
DING Jinjun
,
WANG Yandong(Analysis and Testing Center
,
Northeastern University
,
Shenyang 110006
,
China)
金属学报(英文版)
The microstructures of Ti-14Al-21Nb and Ti-14Al-20Nb-2Mo-3.2V(wt%) alloys have been investikated by transmission electron microscopy(TEM).The phase constitution and the orientation relationship between α2and βwere identified by means of the selected area diffraction and the micro-diffraction techniques.Results show that,compared to Ti-14Al-21Nb,the alloying elements Mo and V can greatly increase the fraction of β phase and improve significantly the microstructures of Ti-14Al-20Nb-2Mo-3.2V.The ordered B2 structure is also evident in the residual βgrains of the latter alloy.
关键词:
:microstructure
,
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,
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,
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DING Hua
,
TANG ZhengYou
,
LI Wei
,
WANG Mei
,
SONG Dan
钢铁研究学报(英文版)
The mechanical properties and microstructure of two low carbon high manganese steels with 238% (No1) and 33% (No2) (mass percent) of manganese were investigated. The results showed that No1 steel possesses high strength and high plasticity, and No2 steel has a relatively high strength and extraordinary plasticity. The No1 steel exhibits both TRIP (transformation induced plasticity) and TWIP (twin induced plasticity) effects during the deformation; while only TWIP effect appeared under the same deformation condition for No.2 steel. The comparison between the microstructures and mechanical properties of two steels was made, and the strengthening mechanisms were also analyzed.
关键词:
manganese;TRIP;TWIP;microstructure;mechanical property
